Alert archive / Nebraska / Mesoscale Discussions in 2020
Mesoscale Discussion 689
The Storm Prediction Center issued this mesoscale discussion at May 23, 2020, 2:57 PM MDT for 4 states. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- May 23, 2020, 2:57 PM MDT (20:57 UTC)
- Expired
- May 23, 2020, 4:30 PM MDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 208
All 38 counties
Logan County, CO, Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Arthur County, NE, Banner County, NE, Box Butte County, NE, Chase County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Keith County, NE, Kimball County, NE, Morrill County, NE, Perkins County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Harding County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Ziebach County, SD, Crook County, WY, Goshen County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY
The radar
The Rapid City radar (KUDX), 125 km from the middle of the area, began a volume at 20:59 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 9.0 hours before the alert went out and 119 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2587 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -114 m²/s²
- 0-3 km storm-relative helicity
- -150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 1:15 PM MDT | Severe Thunderstorm Watch | SPC | Logan, Phillips, Sedgwick | 7 hr |
| May 23, 2:18 PM MDT | Mesoscale Discussion | SPC | Yuma | 117 min |
| May 23, 4:40 PM MDT | Tornado Watch | SPC | Cheyenne, Kit Carson, Yuma | 3 hr |
| May 23, 5:27 PM MDT | Mesoscale Discussion | SPC | Logan, Phillips, Sedgwick | 93 min |
| May 23, 12:48 PM MDT | Mesoscale Discussion | SPC | Banner, Box Butte, Dawes, Kimball, Morrill, Scotts Bluff and 2 more | 117 min |
| May 23, 4:35 PM MDT | Mesoscale Discussion | SPC | Dundy, Frontier, Furnas, Gosper, Hayes, Hitchcock and 1 more | 55 min |
Nearby
Mesoscale Discussions in Nebraska, 2020Mesoscale Discussions in South Dakota, 2020Mesoscale Discussions in Wyoming, 2020Every mesoscale discussion in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.